Hi, I am going to buy a new chip shortly and one of these seems to be the right ones to get. Is there any real diffrence in the two as far as overclockability? Also how does the multi. change on the go in the laptops and is there any way to utilize this in a desktop system w/ software or is this controled by something on the mainboard itself or the BIOS? The reason I ask is out of curiousity for lack of understanding how this process works. Thanks for any help !